Overall tend to agree with the above post in several aspects.
To me and IMO only, the narrative has an amateurish " ring " ( no pun truly intended) to it, such as follows:
"To help you choose the right one we are putting together a list of good things to know. So if you know or find something we have missed then please let us know and we will add it to the site for everyones benefit."
Dislike the use of " good things to know " and might suggest a more imposing authoritative statement such as -
" Important Facts about Diamond Rings " ;
" Diamond Ring Basics "
" About Diamond Rings "
Or something that suggests you, the site owner , " know diamonds " and is authoritative on diamonds.
Also IMO would never ask a visitor to contribute to a presumed " diamond experts " website basic diamond facts with a statement like " if you know or find something we have missed then please let us know ".
Also would enrich or enhance the top photos of the grinning/smiling lady and the surrounding rings creating a bit more drama or excitement to the opening photos.
Like the concept overall and suggest with some visual / verbal changes offer the domain and website together.